E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/22
E21B 43/26 (2006.01) C09K 8/64 (2006.01) C09K 8/94 (2006.01)
Patent
CA 1302870
ABSTRACT OF THE DISCLOSURE A method for breaking the fracturing fluid comprises injecting into the subterranean formation a controlled release breaker capsule including an enclosure material enveloping a breaker. The enclosure material is sufficiently permeable to at least one fluid existing in the subterranean environment or injected with the controlled release capsule such that the breaker capsule is capable of rupturing upon sufficient exposure to the fluid, thereby releasing the breaker. Using the method of the present invention, breaking of fracturing fluids is significantly improved when the tempera- ture in the subterranean environment is from about 20°C to about 65°C.
604312
Dowell Schlumberger Canada Inc.
Smart & Biggar
LandOfFree
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